Which products and versions are affected by CVE-2019-9512?

Affected: Traffic Server (Apache); Swiftnio (Apple); Node.js (Nodejs), among others. The full list is in the CVE brief.

Is CVE-2019-9512 being exploited in the wild?

It is not listed in any known-exploited vulnerabilities catalog.

Is CVE-2019-9512 in the CISA KEV catalog?

No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.

Is there a public exploit for CVE-2019-9512?

No public exploit code is known.

How urgently should CVE-2019-9512 be patched?

Brandefense priority: patch immediately, because it is very likely to be exploited soon.

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Vulnerability Intelligence

CVE-2019-9512

Q: What is CVE-2019-9512?

Some HTTP/2 implementations are vulnerable to ping floods, potentially leading to a denial of service.

High

golang.org/x/net/http vulnerable to ping floods

Published May 24, 2022 · Updated Sep 10, 2026 · Also known as ALPINE-CVE-2019-9512, DEBIAN-CVE-2019-9512, DLA-2485-1, DSA-4508-1, GHSA-hgr8-6h9x-f7q9, GO-2022-0536, UBUNTU-CVE-2019-9512, USN-4866-1

Key Facts

Patch immediately

CVE-2019-9512 is a high-severity vulnerability (CVSS 7.5 v3.1) affecting Traffic Server (Apache), Swiftnio (Apple), Node.js (Nodejs) and 22 more products.
It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
EPSS estimates a 83% probability of exploitation in the next 30 days.
Fixed versions are available, including ansible-operator 0:0.0.1-3.git.59.4beb3d2.el7, ansible-service-broker 0:1.1.20-2.el7, Traffic Server <=6.2.3.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.

CVSS v3.1

7.5

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS (30-day exploit likelihood)

83%

Higher than 99.6% of all scored CVEs

Exploited in the wild

No known

Not in a known-exploited catalog

Public exploit code

None known

Get the full CVE-2019-9512 brief as a PDF

Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.

Description

Some HTTP/2 implementations are vulnerable to ping floods, potentially leading to a denial of service. The attacker sends continual pings to an HTTP/2 peer, causing the peer to build an internal queue of responses. Depending on how efficiently this data is queued, this can consume excess CPU, memory, or both.

Affected Products

580 affected entries in total

Product	Affected versions	Fixed in
Traffic ServerApache	See advisory	6.2.3
SwiftnioApple	See advisory	1.4.0
Node.jsNodejs	See advisory	8.8.1
Debian LinuxDebian	10.0	n/a
goarch	See advisory	2:1.12.8-1

20 more affected products in the full CVE brief

Patched Releases

ansible-operator

0:0.0.1-3.git.59.4beb3d2.el7

ansible-service-broker

0:1.1.20-2.el7

Traffic Server

<=6.2.3

apb

0:1.9.8-1.el7

Swiftnio

<=1.4.0

atomic-enterprise-service-catalog

1:3.11.154-1.git.1.fa68ced.el7

atomic-openshift

0:3.10.170-1.git.0.8e592d6.el7

atomic-openshift-cluster-autoscaler

0:3.11.154-1.git.1.532da7a.el7

atomic-openshift-descheduler

0:3.11.154-1.git.1.1d31032.el7

atomic-openshift-dockerregistry

0:3.9.101-1.git.1.13625cf.el7

atomic-openshift-metrics-server

0:3.11.154-1.git.1.6a6b6ce.el7

atomic-openshift-node-problem-detector

0:3.11.154-1.git.1.5e8e065.el7

atomic-openshift-service-idler

0:3.11.154-1.git.1.f80fb86.el7

atomic-openshift-web-console

0:3.11.154-1.git.1.f54cb18.el7

buildah

1.5-6.0.1.gite94b4f9.module+el8.1.0+5459+24f6812a, 1.9.0-5.0.1.module+el8.1.0+5440+994fc847

buildah-tests

1.9.0-5.0.1.module+el8.1.0+5440+994fc847

cockpit

0:195-2.rhaos.el7

cockpit-podman

4-1.module+el8.1.0+5440+994fc847

container-selinux

2:2.123.0-2.module+el8.1.0+5460+5d763c32, 2:2.94-1.git1e99f1d.module+el8.1.0+5440+42cffa37

container-tools:1.0

8010020191126173920.c294d161

container-tools:rhel8

8010020191126140055.c294d161

containerd

1.2.9-r0

containernetworking-plugins

0:0.8.1-4.el7_7, 0.7.4-4.git9ebe139.module_el8.4.0+2496+12421f43, 0.7.4-4.git9ebe139.module+el8.1.0+5459+24f6812a, 0.7.4-4.git9ebe139.module+el8.5.0+681+c9a1951f, 0.8.1-3.0.1.module+el8.1.0+5460+5d763c32

containers-common

1:0.1.32-6.0.1.git1715c90.module+el8.1.0+5459+24f6812a, 1:0.1.37-6.0.1.module+el8.1.0+5460+5d763c32

cri-o

0:1.13.11-0.10.dev.rhaos4.1.gitbdeb2ca.el7

Timeline

Publicly disclosed
May 24, 2022
Last updated
Sep 10, 2026

Weakness Type

CWE-400 Uncontrolled Resource Consumption
CWE-770 Allocation of Resources Without Limits or Throttling

References

advisoryhttp://blog.kazuhooku.com/2019/08/h2o-version-226-230-beta2-released.html
advisoryRHBA-2019:2819
advisoryRHBA-2019:3139
advisoryRHSA-2019:2817
advisoryRHSA-2020:0922

15 more references in the full CVE brief

FAQ

Common Questions.

Some HTTP/2 implementations are vulnerable to ping floods, potentially leading to a denial of service.
Affected: Traffic Server (Apache); Swiftnio (Apple); Node.js (Nodejs), among others. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including ansible-operator 0:0.0.1-3.git.59.4beb3d2.el7, ansible-service-broker 0:1.1.20-2.el7, Traffic Server <=6.2.3.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.

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